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    <a href="../index.html">cppreference.com</a> &gt; <a href=
    "index.html">C++ Sets</a> &gt; <a href=
    "container_constructors.html">Set constructors &amp;
    destructors</a>
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    Set constructors &amp; destructors
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;set&gt;
  set();
  set( const set&amp; c );
  ~set();
</pre>

  <p>Every set has a default constructor, copy constructor, and
  destructor.</p>

  <p>The default constructor takes no arguments, creates a new instance
  of that set, and runs in <a href="../complexity.html">constant
  time</a>. The default copy constructor runs in <a href=
  "../complexity.html">linear time</a> and can be used to create a new
  set that is a copy of the given set <em>c</em>.</p>

  <p>The default destructor is called when the set should be
  destroyed.</p>

  <p>For example, the following code creates a pointer to a vector of
  integers and then uses the default set constructor to allocate a
  memory for a new vector:</p>
  <pre class="example-code">
 vector&lt;int&gt;* v;
 v = new vector&lt;int&gt;();           
</pre>

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    Related topics:
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    (C++ Strings) <a href="../cppstring/resize.html">resize</a>
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